1 /*
2 * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
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23 */
24
25 #ifndef SHARE_VM_CLASSFILE_JAVACLASSES_HPP
26 #define SHARE_VM_CLASSFILE_JAVACLASSES_HPP
27
28 #include "classfile/systemDictionary.hpp"
29 #include "jvmtifiles/jvmti.h"
30 #include "oops/oop.hpp"
31 #include "runtime/os.hpp"
32 #include "utilities/utf8.hpp"
33
34 // Interface for manipulating the basic Java classes.
35 //
36 // All dependencies on layout of actual Java classes should be kept here.
37 // If the layout of any of the classes above changes the offsets must be adjusted.
38 //
39 // For most classes we hardwire the offsets for performance reasons. In certain
40 // cases (e.g. java.security.AccessControlContext) we compute the offsets at
41 // startup since the layout here differs between JDK1.2 and JDK1.3.
42 //
43 // Note that fields (static and non-static) are arranged with oops before non-oops
44 // on a per class basis. The offsets below have to reflect this ordering.
45 //
46 // When editing the layouts please update the check_offset verification code
47 // correspondingly. The names in the enums must be identical to the actual field
48 // names in order for the verification code to work.
49
50
51 // Interface to java.lang.String objects
52
53 class java_lang_String : AllStatic {
54 private:
55 static int value_offset;
56 static int offset_offset;
57 static int count_offset;
58 static int hash_offset;
59
60 static bool initialized;
61
62 static Handle basic_create(int length, TRAPS);
63
64 static void set_offset(oop string, int offset) {
65 assert(initialized, "Must be initialized");
66 if (offset_offset > 0) {
67 string->int_field_put(offset_offset, offset);
68 }
69 }
70 static void set_count( oop string, int count) {
71 assert(initialized, "Must be initialized");
72 if (count_offset > 0) {
73 string->int_field_put(count_offset, count);
74 }
75 }
76
77 public:
78 static void compute_offsets();
79
80 // Instance creation
81 static Handle create_from_unicode(jchar* unicode, int len, TRAPS);
82 static oop create_oop_from_unicode(jchar* unicode, int len, TRAPS);
83 static Handle create_from_str(const char* utf8_str, TRAPS);
84 static oop create_oop_from_str(const char* utf8_str, TRAPS);
85 static Handle create_from_symbol(Symbol* symbol, TRAPS);
86 static Handle create_from_platform_dependent_str(const char* str, TRAPS);
87 static Handle char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS);
88
89 static bool has_offset_field() {
90 assert(initialized, "Must be initialized");
91 return (offset_offset > 0);
92 }
93
94 static bool has_count_field() {
95 assert(initialized, "Must be initialized");
96 return (count_offset > 0);
97 }
98
99 static bool has_hash_field() {
100 assert(initialized, "Must be initialized");
101 return (hash_offset > 0);
102 }
103
104 static int value_offset_in_bytes() {
105 assert(initialized && (value_offset > 0), "Must be initialized");
106 return value_offset;
107 }
108 static int count_offset_in_bytes() {
109 assert(initialized && (count_offset > 0), "Must be initialized");
110 return count_offset;
111 }
112 static int offset_offset_in_bytes() {
113 assert(initialized && (offset_offset > 0), "Must be initialized");
114 return offset_offset;
115 }
116 static int hash_offset_in_bytes() {
117 assert(initialized && (hash_offset > 0), "Must be initialized");
118 return hash_offset;
119 }
120
121 static void set_value(oop string, typeArrayOop buffer) {
122 assert(initialized && (value_offset > 0), "Must be initialized");
123 string->obj_field_put(value_offset, (oop)buffer);
124 }
125 static void set_hash(oop string, unsigned int hash) {
126 assert(initialized && (hash_offset > 0), "Must be initialized");
127 string->int_field_put(hash_offset, hash);
128 }
129
130 // Accessors
131 static typeArrayOop value(oop java_string) {
132 assert(initialized && (value_offset > 0), "Must be initialized");
133 assert(is_instance(java_string), "must be java_string");
134 return (typeArrayOop) java_string->obj_field(value_offset);
135 }
136 static unsigned int hash(oop java_string) {
137 assert(initialized && (hash_offset > 0), "Must be initialized");
138 assert(is_instance(java_string), "must be java_string");
139 return java_string->int_field(hash_offset);
140 }
141 static int offset(oop java_string) {
142 assert(initialized, "Must be initialized");
143 assert(is_instance(java_string), "must be java_string");
144 if (offset_offset > 0) {
145 return java_string->int_field(offset_offset);
146 } else {
147 return 0;
148 }
149 }
150 static int length(oop java_string) {
151 assert(initialized, "Must be initialized");
152 assert(is_instance(java_string), "must be java_string");
153 if (count_offset > 0) {
154 return java_string->int_field(count_offset);
155 } else {
156 return ((typeArrayOop)java_string->obj_field(value_offset))->length();
157 }
158 }
159 static int utf8_length(oop java_string);
160
161 // String converters
162 static char* as_utf8_string(oop java_string);
163 static char* as_utf8_string(oop java_string, char* buf, int buflen);
164 static char* as_utf8_string(oop java_string, int start, int len);
165 static char* as_platform_dependent_str(Handle java_string, TRAPS);
166 static jchar* as_unicode_string(oop java_string, int& length, TRAPS);
167 // produce an ascii string with all other values quoted using \u####
168 static char* as_quoted_ascii(oop java_string);
169
170 // Compute the hash value for a java.lang.String object which would
171 // contain the characters passed in.
172 //
173 // As the hash value used by the String object itself, in
174 // String.hashCode(). This value is normally calculated in Java code
175 // in the String.hashCode method(), but is precomputed for String
176 // objects in the shared archive file.
177 // hash P(31) from Kernighan & Ritchie
178 //
179 // For this reason, THIS ALGORITHM MUST MATCH String.hashCode().
180 template <typename T> static unsigned int hash_code(T* s, int len) {
181 unsigned int h = 0;
182 while (len-- > 0) {
183 h = 31*h + (unsigned int) *s;
184 s++;
185 }
186 return h;
187 }
188 static unsigned int hash_code(oop java_string);
189
190 // This is the string hash code used by the StringTable, which may be
191 // the same as String.hashCode or an alternate hash code.
192 static unsigned int hash_string(oop java_string);
193
194 static bool equals(oop java_string, jchar* chars, int len);
195 static bool equals(oop str1, oop str2);
196
197 // Conversion between '.' and '/' formats
198 static Handle externalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '/', '.', THREAD); }
199 static Handle internalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '.', '/', THREAD); }
200
201 // Conversion
202 static Symbol* as_symbol(Handle java_string, TRAPS);
203 static Symbol* as_symbol_or_null(oop java_string);
204
205 // Testers
206 static bool is_instance(oop obj) {
207 return obj != NULL && obj->klass() == SystemDictionary::String_klass();
208 }
209
210 // Debugging
211 static void print(oop java_string, outputStream* st);
212 friend class JavaClasses;
213 };
214
215
216 // Interface to java.lang.Class objects
217
218 #define CLASS_INJECTED_FIELDS(macro) \
219 macro(java_lang_Class, klass, intptr_signature, false) \
220 macro(java_lang_Class, array_klass, intptr_signature, false) \
221 macro(java_lang_Class, oop_size, int_signature, false) \
222 macro(java_lang_Class, static_oop_field_count, int_signature, false) \
223 macro(java_lang_Class, protection_domain, object_signature, false) \
224 macro(java_lang_Class, init_lock, object_signature, false) \
225 macro(java_lang_Class, signers, object_signature, false)
226
227 class java_lang_Class : AllStatic {
228 friend class VMStructs;
229
230 private:
231 // The fake offsets are added by the class loader when java.lang.Class is loaded
232
233 static int _klass_offset;
234 static int _array_klass_offset;
235
236 static int _oop_size_offset;
237 static int _static_oop_field_count_offset;
238
239 static int _protection_domain_offset;
240 static int _init_lock_offset;
241 static int _signers_offset;
242 static int _class_loader_offset;
243
244 static bool offsets_computed;
245 static int classRedefinedCount_offset;
246
247 static GrowableArray<Klass*>* _fixup_mirror_list;
248
249 static void set_init_lock(oop java_class, oop init_lock);
250 static void set_protection_domain(oop java_class, oop protection_domain);
251 static void set_class_loader(oop java_class, oop class_loader);
252 static void initialize_mirror_fields(KlassHandle k, Handle mirror, Handle protection_domain, TRAPS);
253 public:
254 static void compute_offsets();
255
256 // Instance creation
257 static void create_mirror(KlassHandle k, Handle class_loader,
258 Handle protection_domain, TRAPS);
259 static void fixup_mirror(KlassHandle k, TRAPS);
260 static oop create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS);
261 // Conversion
262 static Klass* as_Klass(oop java_class);
263 static void set_klass(oop java_class, Klass* klass);
264 static BasicType as_BasicType(oop java_class, Klass** reference_klass = NULL);
265 static BasicType as_BasicType(oop java_class, KlassHandle* reference_klass) {
266 Klass* refk_oop = NULL;
267 BasicType result = as_BasicType(java_class, &refk_oop);
268 (*reference_klass) = KlassHandle(refk_oop);
269 return result;
270 }
271 static Symbol* as_signature(oop java_class, bool intern_if_not_found, TRAPS);
272 static void print_signature(oop java_class, outputStream *st);
273 // Testing
274 static bool is_instance(oop obj) {
275 return obj != NULL && obj->klass() == SystemDictionary::Class_klass();
276 }
277 static bool is_primitive(oop java_class);
278 static BasicType primitive_type(oop java_class);
279 static oop primitive_mirror(BasicType t);
280 // JVM_NewArray support
281 static Klass* array_klass(oop java_class);
282 static void set_array_klass(oop java_class, Klass* klass);
283 // compiler support for class operations
284 static int klass_offset_in_bytes() { return _klass_offset; }
285 static int array_klass_offset_in_bytes() { return _array_klass_offset; }
286 // Support for classRedefinedCount field
287 static int classRedefinedCount(oop the_class_mirror);
288 static void set_classRedefinedCount(oop the_class_mirror, int value);
289
290 // Support for embedded per-class oops
291 static oop protection_domain(oop java_class);
292 static oop init_lock(oop java_class);
293 static objArrayOop signers(oop java_class);
294 static void set_signers(oop java_class, objArrayOop signers);
295
296 static oop class_loader(oop java_class);
297
298 static int oop_size(oop java_class);
299 static void set_oop_size(oop java_class, int size);
300 static int static_oop_field_count(oop java_class);
301 static void set_static_oop_field_count(oop java_class, int size);
302
303 static GrowableArray<Klass*>* fixup_mirror_list() {
304 return _fixup_mirror_list;
305 }
306 static void set_fixup_mirror_list(GrowableArray<Klass*>* v) {
307 _fixup_mirror_list = v;
308 }
309 // Debugging
310 friend class JavaClasses;
311 friend class InstanceKlass; // verification code accesses offsets
312 friend class ClassFileParser; // access to number_of_fake_fields
313 };
314
315 // Interface to java.lang.Thread objects
316
317 class java_lang_Thread : AllStatic {
318 private:
319 // Note that for this class the layout changed between JDK1.2 and JDK1.3,
320 // so we compute the offsets at startup rather than hard-wiring them.
321 static int _name_offset;
322 static int _group_offset;
323 static int _contextClassLoader_offset;
324 static int _inheritedAccessControlContext_offset;
325 static int _priority_offset;
326 static int _eetop_offset;
327 static int _daemon_offset;
328 static int _stillborn_offset;
329 static int _stackSize_offset;
330 static int _tid_offset;
331 static int _thread_status_offset;
332 static int _park_blocker_offset;
333 static int _park_event_offset ;
334
335 static void compute_offsets();
336
337 public:
338 // Instance creation
339 static oop create();
340 // Returns the JavaThread associated with the thread obj
341 static JavaThread* thread(oop java_thread);
342 // Set JavaThread for instance
343 static void set_thread(oop java_thread, JavaThread* thread);
344 // Name
345 static typeArrayOop name(oop java_thread);
346 static void set_name(oop java_thread, typeArrayOop name);
347 // Priority
348 static ThreadPriority priority(oop java_thread);
349 static void set_priority(oop java_thread, ThreadPriority priority);
350 // Thread group
351 static oop threadGroup(oop java_thread);
352 // Stillborn
353 static bool is_stillborn(oop java_thread);
354 static void set_stillborn(oop java_thread);
355 // Alive (NOTE: this is not really a field, but provides the correct
356 // definition without doing a Java call)
357 static bool is_alive(oop java_thread);
358 // Daemon
359 static bool is_daemon(oop java_thread);
360 static void set_daemon(oop java_thread);
361 // Context ClassLoader
362 static oop context_class_loader(oop java_thread);
363 // Control context
364 static oop inherited_access_control_context(oop java_thread);
365 // Stack size hint
366 static jlong stackSize(oop java_thread);
367 // Thread ID
368 static jlong thread_id(oop java_thread);
369
370 // Blocker object responsible for thread parking
371 static oop park_blocker(oop java_thread);
372
373 // Pointer to type-stable park handler, encoded as jlong.
374 // Should be set when apparently null
375 // For details, see unsafe.cpp Unsafe_Unpark
376 static jlong park_event(oop java_thread);
377 static bool set_park_event(oop java_thread, jlong ptr);
378
379 // Java Thread Status for JVMTI and M&M use.
380 // This thread status info is saved in threadStatus field of
381 // java.lang.Thread java class.
382 enum ThreadStatus {
383 NEW = 0,
384 RUNNABLE = JVMTI_THREAD_STATE_ALIVE + // runnable / running
385 JVMTI_THREAD_STATE_RUNNABLE,
386 SLEEPING = JVMTI_THREAD_STATE_ALIVE + // Thread.sleep()
387 JVMTI_THREAD_STATE_WAITING +
388 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
389 JVMTI_THREAD_STATE_SLEEPING,
390 IN_OBJECT_WAIT = JVMTI_THREAD_STATE_ALIVE + // Object.wait()
391 JVMTI_THREAD_STATE_WAITING +
392 JVMTI_THREAD_STATE_WAITING_INDEFINITELY +
393 JVMTI_THREAD_STATE_IN_OBJECT_WAIT,
394 IN_OBJECT_WAIT_TIMED = JVMTI_THREAD_STATE_ALIVE + // Object.wait(long)
395 JVMTI_THREAD_STATE_WAITING +
396 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
397 JVMTI_THREAD_STATE_IN_OBJECT_WAIT,
398 PARKED = JVMTI_THREAD_STATE_ALIVE + // LockSupport.park()
399 JVMTI_THREAD_STATE_WAITING +
400 JVMTI_THREAD_STATE_WAITING_INDEFINITELY +
401 JVMTI_THREAD_STATE_PARKED,
402 PARKED_TIMED = JVMTI_THREAD_STATE_ALIVE + // LockSupport.park(long)
403 JVMTI_THREAD_STATE_WAITING +
404 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
405 JVMTI_THREAD_STATE_PARKED,
406 BLOCKED_ON_MONITOR_ENTER = JVMTI_THREAD_STATE_ALIVE + // (re-)entering a synchronization block
407 JVMTI_THREAD_STATE_BLOCKED_ON_MONITOR_ENTER,
408 TERMINATED = JVMTI_THREAD_STATE_TERMINATED
409 };
410 // Write thread status info to threadStatus field of java.lang.Thread.
411 static void set_thread_status(oop java_thread_oop, ThreadStatus status);
412 // Read thread status info from threadStatus field of java.lang.Thread.
413 static ThreadStatus get_thread_status(oop java_thread_oop);
414
415 static const char* thread_status_name(oop java_thread_oop);
416
417 // Debugging
418 friend class JavaClasses;
419 };
420
421 // Interface to java.lang.ThreadGroup objects
422
423 class java_lang_ThreadGroup : AllStatic {
424 private:
425 static int _parent_offset;
426 static int _name_offset;
427 static int _threads_offset;
428 static int _groups_offset;
429 static int _maxPriority_offset;
430 static int _destroyed_offset;
431 static int _daemon_offset;
432 static int _vmAllowSuspension_offset;
433 static int _nthreads_offset;
434 static int _ngroups_offset;
435
436 static void compute_offsets();
437
438 public:
439 // parent ThreadGroup
440 static oop parent(oop java_thread_group);
441 // name
442 static typeArrayOop name(oop java_thread_group);
443 // ("name as oop" accessor is not necessary)
444 // Number of threads in group
445 static int nthreads(oop java_thread_group);
446 // threads
447 static objArrayOop threads(oop java_thread_group);
448 // Number of threads in group
449 static int ngroups(oop java_thread_group);
450 // groups
451 static objArrayOop groups(oop java_thread_group);
452 // maxPriority in group
453 static ThreadPriority maxPriority(oop java_thread_group);
454 // Destroyed
455 static bool is_destroyed(oop java_thread_group);
456 // Daemon
457 static bool is_daemon(oop java_thread_group);
458 // vmAllowSuspension
459 static bool is_vmAllowSuspension(oop java_thread_group);
460 // Debugging
461 friend class JavaClasses;
462 };
463
464
465
466 // Interface to java.lang.Throwable objects
467
468 class java_lang_Throwable: AllStatic {
469 friend class BacktraceBuilder;
470
471 private:
472 // Offsets
473 enum {
474 hc_backtrace_offset = 0,
475 hc_detailMessage_offset = 1,
476 hc_cause_offset = 2, // New since 1.4
477 hc_stackTrace_offset = 3 // New since 1.4
478 };
479 enum {
480 hc_static_unassigned_stacktrace_offset = 0 // New since 1.7
481 };
482 // Trace constants
483 enum {
484 trace_methods_offset = 0,
485 trace_bcis_offset = 1,
486 trace_mirrors_offset = 2,
487 trace_next_offset = 3,
488 trace_size = 4,
489 trace_chunk_size = 32
490 };
491
492 static int backtrace_offset;
493 static int detailMessage_offset;
494 static int cause_offset;
495 static int stackTrace_offset;
496 static int static_unassigned_stacktrace_offset;
497
498 // Printing
499 static char* print_stack_element_to_buffer(Handle mirror, int method, int version, int bci);
500 // StackTrace (programmatic access, new since 1.4)
501 static void clear_stacktrace(oop throwable);
502 // No stack trace available
503 static const char* no_stack_trace_message();
504 // Stacktrace (post JDK 1.7.0 to allow immutability protocol to be followed)
505 static void set_stacktrace(oop throwable, oop st_element_array);
506 static oop unassigned_stacktrace();
507
508 public:
509 // Backtrace
510 static oop backtrace(oop throwable);
511 static void set_backtrace(oop throwable, oop value);
512 // Needed by JVMTI to filter out this internal field.
513 static int get_backtrace_offset() { return backtrace_offset;}
514 static int get_detailMessage_offset() { return detailMessage_offset;}
515 // Message
516 static oop message(oop throwable);
517 static oop message(Handle throwable);
518 static void set_message(oop throwable, oop value);
519 static void print_stack_element(outputStream *st, Handle mirror, int method,
520 int version, int bci);
521 static void print_stack_element(outputStream *st, methodHandle method, int bci);
522 static void print_stack_usage(Handle stream);
523
524 // Allocate space for backtrace (created but stack trace not filled in)
525 static void allocate_backtrace(Handle throwable, TRAPS);
526 // Fill in current stack trace for throwable with preallocated backtrace (no GC)
527 static void fill_in_stack_trace_of_preallocated_backtrace(Handle throwable);
528 // Fill in current stack trace, can cause GC
529 static void fill_in_stack_trace(Handle throwable, methodHandle method, TRAPS);
530 static void fill_in_stack_trace(Handle throwable, methodHandle method = methodHandle());
531 // Programmatic access to stack trace
532 static oop get_stack_trace_element(oop throwable, int index, TRAPS);
533 static int get_stack_trace_depth(oop throwable, TRAPS);
534 // Printing
535 static void print(oop throwable, outputStream* st);
536 static void print(Handle throwable, outputStream* st);
537 static void print_stack_trace(oop throwable, outputStream* st);
538 // Debugging
539 friend class JavaClasses;
540 };
541
542
543 // Interface to java.lang.reflect.AccessibleObject objects
544
545 class java_lang_reflect_AccessibleObject: AllStatic {
546 private:
547 // Note that to reduce dependencies on the JDK we compute these
548 // offsets at run-time.
549 static int override_offset;
550
551 static void compute_offsets();
552
553 public:
554 // Accessors
555 static jboolean override(oop reflect);
556 static void set_override(oop reflect, jboolean value);
557
558 // Debugging
559 friend class JavaClasses;
560 };
561
562
563 // Interface to java.lang.reflect.Method objects
564
565 class java_lang_reflect_Method : public java_lang_reflect_AccessibleObject {
566 private:
567 // Note that to reduce dependencies on the JDK we compute these
568 // offsets at run-time.
569 static int clazz_offset;
570 static int name_offset;
571 static int returnType_offset;
572 static int parameterTypes_offset;
573 static int exceptionTypes_offset;
574 static int slot_offset;
575 static int modifiers_offset;
576 static int signature_offset;
577 static int annotations_offset;
578 static int parameter_annotations_offset;
579 static int annotation_default_offset;
580 static int type_annotations_offset;
581
582 static void compute_offsets();
583
584 public:
585 // Allocation
586 static Handle create(TRAPS);
587
588 // Accessors
589 static oop clazz(oop reflect);
590 static void set_clazz(oop reflect, oop value);
591
592 static oop name(oop method);
593 static void set_name(oop method, oop value);
594
595 static oop return_type(oop method);
596 static void set_return_type(oop method, oop value);
597
598 static oop parameter_types(oop method);
599 static void set_parameter_types(oop method, oop value);
600
601 static oop exception_types(oop method);
602 static void set_exception_types(oop method, oop value);
603
604 static int slot(oop reflect);
605 static void set_slot(oop reflect, int value);
606
607 static int modifiers(oop method);
608 static void set_modifiers(oop method, int value);
609
610 static bool has_signature_field();
611 static oop signature(oop method);
612 static void set_signature(oop method, oop value);
613
614 static bool has_annotations_field();
615 static oop annotations(oop method);
616 static void set_annotations(oop method, oop value);
617
618 static bool has_parameter_annotations_field();
619 static oop parameter_annotations(oop method);
620 static void set_parameter_annotations(oop method, oop value);
621
622 static bool has_annotation_default_field();
623 static oop annotation_default(oop method);
624 static void set_annotation_default(oop method, oop value);
625
626 static bool has_type_annotations_field();
627 static oop type_annotations(oop method);
628 static void set_type_annotations(oop method, oop value);
629
630 // Debugging
631 friend class JavaClasses;
632 };
633
634
635 // Interface to java.lang.reflect.Constructor objects
636
637 class java_lang_reflect_Constructor : public java_lang_reflect_AccessibleObject {
638 private:
639 // Note that to reduce dependencies on the JDK we compute these
640 // offsets at run-time.
641 static int clazz_offset;
642 static int parameterTypes_offset;
643 static int exceptionTypes_offset;
644 static int slot_offset;
645 static int modifiers_offset;
646 static int signature_offset;
647 static int annotations_offset;
648 static int parameter_annotations_offset;
649 static int type_annotations_offset;
650
651 static void compute_offsets();
652
653 public:
654 // Allocation
655 static Handle create(TRAPS);
656
657 // Accessors
658 static oop clazz(oop reflect);
659 static void set_clazz(oop reflect, oop value);
660
661 static oop parameter_types(oop constructor);
662 static void set_parameter_types(oop constructor, oop value);
663
664 static oop exception_types(oop constructor);
665 static void set_exception_types(oop constructor, oop value);
666
667 static int slot(oop reflect);
668 static void set_slot(oop reflect, int value);
669
670 static int modifiers(oop constructor);
671 static void set_modifiers(oop constructor, int value);
672
673 static bool has_signature_field();
674 static oop signature(oop constructor);
675 static void set_signature(oop constructor, oop value);
676
677 static bool has_annotations_field();
678 static oop annotations(oop constructor);
679 static void set_annotations(oop constructor, oop value);
680
681 static bool has_parameter_annotations_field();
682 static oop parameter_annotations(oop method);
683 static void set_parameter_annotations(oop method, oop value);
684
685 static bool has_type_annotations_field();
686 static oop type_annotations(oop constructor);
687 static void set_type_annotations(oop constructor, oop value);
688
689 // Debugging
690 friend class JavaClasses;
691 };
692
693
694 // Interface to java.lang.reflect.Field objects
695
696 class java_lang_reflect_Field : public java_lang_reflect_AccessibleObject {
697 private:
698 // Note that to reduce dependencies on the JDK we compute these
699 // offsets at run-time.
700 static int clazz_offset;
701 static int name_offset;
702 static int type_offset;
703 static int slot_offset;
704 static int modifiers_offset;
705 static int signature_offset;
706 static int annotations_offset;
707 static int type_annotations_offset;
708
709 static void compute_offsets();
710
711 public:
712 // Allocation
713 static Handle create(TRAPS);
714
715 // Accessors
716 static oop clazz(oop reflect);
717 static void set_clazz(oop reflect, oop value);
718
719 static oop name(oop field);
720 static void set_name(oop field, oop value);
721
722 static oop type(oop field);
723 static void set_type(oop field, oop value);
724
725 static int slot(oop reflect);
726 static void set_slot(oop reflect, int value);
727
728 static int modifiers(oop field);
729 static void set_modifiers(oop field, int value);
730
731 static bool has_signature_field();
732 static oop signature(oop constructor);
733 static void set_signature(oop constructor, oop value);
734
735 static bool has_annotations_field();
736 static oop annotations(oop constructor);
737 static void set_annotations(oop constructor, oop value);
738
739 static bool has_parameter_annotations_field();
740 static oop parameter_annotations(oop method);
741 static void set_parameter_annotations(oop method, oop value);
742
743 static bool has_annotation_default_field();
744 static oop annotation_default(oop method);
745 static void set_annotation_default(oop method, oop value);
746
747 static bool has_type_annotations_field();
748 static oop type_annotations(oop field);
749 static void set_type_annotations(oop field, oop value);
750
751 // Debugging
752 friend class JavaClasses;
753 };
754
755 class java_lang_reflect_Parameter {
756 private:
757 // Note that to reduce dependencies on the JDK we compute these
758 // offsets at run-time.
759 static int name_offset;
760 static int modifiers_offset;
761 static int index_offset;
762 static int executable_offset;
763
764 static void compute_offsets();
765
766 public:
767 // Allocation
768 static Handle create(TRAPS);
769
770 // Accessors
771 static oop name(oop field);
772 static void set_name(oop field, oop value);
773
774 static int index(oop reflect);
775 static void set_index(oop reflect, int value);
776
777 static int modifiers(oop reflect);
778 static void set_modifiers(oop reflect, int value);
779
780 static oop executable(oop constructor);
781 static void set_executable(oop constructor, oop value);
782
783 friend class JavaClasses;
784 };
785
786 // Interface to sun.reflect.ConstantPool objects
787 class sun_reflect_ConstantPool {
788 private:
789 // Note that to reduce dependencies on the JDK we compute these
790 // offsets at run-time.
791 static int _oop_offset;
792
793 static void compute_offsets();
794
795 public:
796 // Allocation
797 static Handle create(TRAPS);
798
799 // Accessors
800 static void set_cp(oop reflect, ConstantPool* value);
801 static int oop_offset() {
802 return _oop_offset;
803 }
804
805 static ConstantPool* get_cp(oop reflect);
806
807 // Debugging
808 friend class JavaClasses;
809 };
810
811 // Interface to sun.reflect.UnsafeStaticFieldAccessorImpl objects
812 class sun_reflect_UnsafeStaticFieldAccessorImpl {
813 private:
814 static int _base_offset;
815 static void compute_offsets();
816
817 public:
818 static int base_offset() {
819 return _base_offset;
820 }
821
822 // Debugging
823 friend class JavaClasses;
824 };
825
826 // Interface to java.lang primitive type boxing objects:
827 // - java.lang.Boolean
828 // - java.lang.Character
829 // - java.lang.Float
830 // - java.lang.Double
831 // - java.lang.Byte
832 // - java.lang.Short
833 // - java.lang.Integer
834 // - java.lang.Long
835
836 // This could be separated out into 8 individual classes.
837
838 class java_lang_boxing_object: AllStatic {
839 private:
840 enum {
841 hc_value_offset = 0
842 };
843 static int value_offset;
844 static int long_value_offset;
845
846 static oop initialize_and_allocate(BasicType type, TRAPS);
847 public:
848 // Allocation. Returns a boxed value, or NULL for invalid type.
849 static oop create(BasicType type, jvalue* value, TRAPS);
850 // Accessors. Returns the basic type being boxed, or T_ILLEGAL for invalid oop.
851 static BasicType get_value(oop box, jvalue* value);
852 static BasicType set_value(oop box, jvalue* value);
853 static BasicType basic_type(oop box);
854 static bool is_instance(oop box) { return basic_type(box) != T_ILLEGAL; }
855 static bool is_instance(oop box, BasicType type) { return basic_type(box) == type; }
856 static void print(oop box, outputStream* st) { jvalue value; print(get_value(box, &value), &value, st); }
857 static void print(BasicType type, jvalue* value, outputStream* st);
858
859 static int value_offset_in_bytes(BasicType type) {
860 return ( type == T_LONG || type == T_DOUBLE ) ? long_value_offset :
861 value_offset;
862 }
863
864 // Debugging
865 friend class JavaClasses;
866 };
867
868
869
870 // Interface to java.lang.ref.Reference objects
871
872 class java_lang_ref_Reference: AllStatic {
873 public:
874 enum {
875 hc_referent_offset = 0,
876 hc_queue_offset = 1,
877 hc_next_offset = 2,
878 hc_discovered_offset = 3 // Is not last, see SoftRefs.
879 };
880 enum {
881 hc_static_lock_offset = 0,
882 hc_static_pending_offset = 1
883 };
884
885 static int referent_offset;
886 static int queue_offset;
887 static int next_offset;
888 static int discovered_offset;
889 static int static_lock_offset;
890 static int static_pending_offset;
891 static int number_of_fake_oop_fields;
892
893 // Accessors
894 static oop referent(oop ref) {
895 return ref->obj_field(referent_offset);
896 }
897 static void set_referent(oop ref, oop value) {
898 ref->obj_field_put(referent_offset, value);
899 }
900 static void set_referent_raw(oop ref, oop value) {
901 ref->obj_field_put_raw(referent_offset, value);
902 }
903 static HeapWord* referent_addr(oop ref) {
904 return ref->obj_field_addr<HeapWord>(referent_offset);
905 }
906 static oop next(oop ref) {
907 return ref->obj_field(next_offset);
908 }
909 static void set_next(oop ref, oop value) {
910 ref->obj_field_put(next_offset, value);
911 }
912 static void set_next_raw(oop ref, oop value) {
913 ref->obj_field_put_raw(next_offset, value);
914 }
915 static HeapWord* next_addr(oop ref) {
916 return ref->obj_field_addr<HeapWord>(next_offset);
917 }
918 static oop discovered(oop ref) {
919 return ref->obj_field(discovered_offset);
920 }
921 static void set_discovered(oop ref, oop value) {
922 ref->obj_field_put(discovered_offset, value);
923 }
924 static void set_discovered_raw(oop ref, oop value) {
925 ref->obj_field_put_raw(discovered_offset, value);
926 }
927 static HeapWord* discovered_addr(oop ref) {
928 return ref->obj_field_addr<HeapWord>(discovered_offset);
929 }
930 // Accessors for statics
931 static oop pending_list_lock();
932 static oop pending_list();
933
934 static HeapWord* pending_list_lock_addr();
935 static HeapWord* pending_list_addr();
936 };
937
938
939 // Interface to java.lang.ref.SoftReference objects
940
941 class java_lang_ref_SoftReference: public java_lang_ref_Reference {
942 public:
943 enum {
944 // The timestamp is a long field and may need to be adjusted for alignment.
945 hc_timestamp_offset = hc_discovered_offset + 1
946 };
947 enum {
948 hc_static_clock_offset = 0
949 };
950
951 static int timestamp_offset;
952 static int static_clock_offset;
953
954 // Accessors
955 static jlong timestamp(oop ref);
956
957 // Accessors for statics
958 static jlong clock();
959 static void set_clock(jlong value);
960 };
961
962
963 // Interface to java.lang.invoke.MethodHandle objects
964
965 class MethodHandleEntry;
966
967 class java_lang_invoke_MethodHandle: AllStatic {
968 friend class JavaClasses;
969
970 private:
971 static int _type_offset; // the MethodType of this MH
972 static int _form_offset; // the LambdaForm of this MH
973
974 static void compute_offsets();
975
976 public:
977 // Accessors
978 static oop type(oop mh);
979 static void set_type(oop mh, oop mtype);
980
981 static oop form(oop mh);
982 static void set_form(oop mh, oop lform);
983
984 // Testers
985 static bool is_subclass(Klass* klass) {
986 return klass->is_subclass_of(SystemDictionary::MethodHandle_klass());
987 }
988 static bool is_instance(oop obj) {
989 return obj != NULL && is_subclass(obj->klass());
990 }
991
992 // Accessors for code generation:
993 static int type_offset_in_bytes() { return _type_offset; }
994 static int form_offset_in_bytes() { return _form_offset; }
995 };
996
997 // Interface to java.lang.invoke.DirectMethodHandle objects
998
999 class java_lang_invoke_DirectMethodHandle: AllStatic {
1000 friend class JavaClasses;
1001
1002 private:
1003 static int _member_offset; // the MemberName of this DMH
1004
1005 static void compute_offsets();
1006
1007 public:
1008 // Accessors
1009 static oop member(oop mh);
1010
1011 // Testers
1012 static bool is_subclass(Klass* klass) {
1013 return klass->is_subclass_of(SystemDictionary::DirectMethodHandle_klass());
1014 }
1015 static bool is_instance(oop obj) {
1016 return obj != NULL && is_subclass(obj->klass());
1017 }
1018
1019 // Accessors for code generation:
1020 static int member_offset_in_bytes() { return _member_offset; }
1021 };
1022
1023 // Interface to java.lang.invoke.LambdaForm objects
1024 // (These are a private interface for managing adapter code generation.)
1025
1026 class java_lang_invoke_LambdaForm: AllStatic {
1027 friend class JavaClasses;
1028
1029 private:
1030 static int _vmentry_offset; // type is MemberName
1031
1032 static void compute_offsets();
1033
1034 public:
1035 // Accessors
1036 static oop vmentry(oop lform);
1037 static void set_vmentry(oop lform, oop invoker);
1038
1039 // Testers
1040 static bool is_subclass(Klass* klass) {
1041 return SystemDictionary::LambdaForm_klass() != NULL &&
1042 klass->is_subclass_of(SystemDictionary::LambdaForm_klass());
1043 }
1044 static bool is_instance(oop obj) {
1045 return obj != NULL && is_subclass(obj->klass());
1046 }
1047
1048 // Accessors for code generation:
1049 static int vmentry_offset_in_bytes() { return _vmentry_offset; }
1050 };
1051
1052
1053 // Interface to java.lang.invoke.MemberName objects
1054 // (These are a private interface for Java code to query the class hierarchy.)
1055
1056 #define MEMBERNAME_INJECTED_FIELDS(macro) \
1057 macro(java_lang_invoke_MemberName, vmloader, object_signature, false) \
1058 macro(java_lang_invoke_MemberName, vmindex, intptr_signature, false) \
1059 macro(java_lang_invoke_MemberName, vmtarget, intptr_signature, false)
1060
1061 class java_lang_invoke_MemberName: AllStatic {
1062 friend class JavaClasses;
1063
1064 private:
1065 // From java.lang.invoke.MemberName:
1066 // private Class<?> clazz; // class in which the method is defined
1067 // private String name; // may be null if not yet materialized
1068 // private Object type; // may be null if not yet materialized
1069 // private int flags; // modifier bits; see reflect.Modifier
1070 // private intptr vmtarget; // VM-specific target value
1071 // private intptr_t vmindex; // member index within class or interface
1072 static int _clazz_offset;
1073 static int _name_offset;
1074 static int _type_offset;
1075 static int _flags_offset;
1076 static int _vmtarget_offset;
1077 static int _vmloader_offset;
1078 static int _vmindex_offset;
1079
1080 static void compute_offsets();
1081
1082 public:
1083 // Accessors
1084 static oop clazz(oop mname);
1085 static void set_clazz(oop mname, oop clazz);
1086
1087 static oop type(oop mname);
1088 static void set_type(oop mname, oop type);
1089
1090 static oop name(oop mname);
1091 static void set_name(oop mname, oop name);
1092
1093 static int flags(oop mname);
1094 static void set_flags(oop mname, int flags);
1095
1096 static Metadata* vmtarget(oop mname);
1097 static void set_vmtarget(oop mname, Metadata* target);
1098 #if INCLUDE_JVMTI
1099 static void adjust_vmtarget(oop mname, Metadata* target);
1100 #endif // INCLUDE_JVMTI
1101
1102 static intptr_t vmindex(oop mname);
1103 static void set_vmindex(oop mname, intptr_t index);
1104
1105 // Testers
1106 static bool is_subclass(Klass* klass) {
1107 return klass->is_subclass_of(SystemDictionary::MemberName_klass());
1108 }
1109 static bool is_instance(oop obj) {
1110 return obj != NULL && is_subclass(obj->klass());
1111 }
1112
1113 // Relevant integer codes (keep these in synch. with MethodHandleNatives.Constants):
1114 enum {
1115 MN_IS_METHOD = 0x00010000, // method (not constructor)
1116 MN_IS_CONSTRUCTOR = 0x00020000, // constructor
1117 MN_IS_FIELD = 0x00040000, // field
1118 MN_IS_TYPE = 0x00080000, // nested type
1119 MN_CALLER_SENSITIVE = 0x00100000, // @CallerSensitive annotation detected
1120 MN_REFERENCE_KIND_SHIFT = 24, // refKind
1121 MN_REFERENCE_KIND_MASK = 0x0F000000 >> MN_REFERENCE_KIND_SHIFT,
1122 // The SEARCH_* bits are not for MN.flags but for the matchFlags argument of MHN.getMembers:
1123 MN_SEARCH_SUPERCLASSES = 0x00100000, // walk super classes
1124 MN_SEARCH_INTERFACES = 0x00200000 // walk implemented interfaces
1125 };
1126
1127 // Accessors for code generation:
1128 static int clazz_offset_in_bytes() { return _clazz_offset; }
1129 static int type_offset_in_bytes() { return _type_offset; }
1130 static int name_offset_in_bytes() { return _name_offset; }
1131 static int flags_offset_in_bytes() { return _flags_offset; }
1132 static int vmtarget_offset_in_bytes() { return _vmtarget_offset; }
1133 static int vmindex_offset_in_bytes() { return _vmindex_offset; }
1134 };
1135
1136
1137 // Interface to java.lang.invoke.MethodType objects
1138
1139 class java_lang_invoke_MethodType: AllStatic {
1140 friend class JavaClasses;
1141
1142 private:
1143 static int _rtype_offset;
1144 static int _ptypes_offset;
1145
1146 static void compute_offsets();
1147
1148 public:
1149 // Accessors
1150 static oop rtype(oop mt);
1151 static objArrayOop ptypes(oop mt);
1152
1153 static oop ptype(oop mt, int index);
1154 static int ptype_count(oop mt);
1155
1156 static int ptype_slot_count(oop mt); // extra counts for long/double
1157 static int rtype_slot_count(oop mt); // extra counts for long/double
1158
1159 static Symbol* as_signature(oop mt, bool intern_if_not_found, TRAPS);
1160 static void print_signature(oop mt, outputStream* st);
1161
1162 static bool is_instance(oop obj) {
1163 return obj != NULL && obj->klass() == SystemDictionary::MethodType_klass();
1164 }
1165
1166 static bool equals(oop mt1, oop mt2);
1167
1168 // Accessors for code generation:
1169 static int rtype_offset_in_bytes() { return _rtype_offset; }
1170 static int ptypes_offset_in_bytes() { return _ptypes_offset; }
1171 };
1172
1173
1174 // Interface to java.lang.invoke.CallSite objects
1175
1176 class java_lang_invoke_CallSite: AllStatic {
1177 friend class JavaClasses;
1178
1179 private:
1180 static int _target_offset;
1181
1182 static void compute_offsets();
1183
1184 public:
1185 // Accessors
1186 static oop target( oop site) { return site->obj_field( _target_offset); }
1187 static void set_target( oop site, oop target) { site->obj_field_put( _target_offset, target); }
1188
1189 static volatile oop target_volatile(oop site) { return site->obj_field_volatile( _target_offset); }
1190 static void set_target_volatile(oop site, oop target) { site->obj_field_put_volatile(_target_offset, target); }
1191
1192 // Testers
1193 static bool is_subclass(Klass* klass) {
1194 return klass->is_subclass_of(SystemDictionary::CallSite_klass());
1195 }
1196 static bool is_instance(oop obj) {
1197 return obj != NULL && is_subclass(obj->klass());
1198 }
1199
1200 // Accessors for code generation:
1201 static int target_offset_in_bytes() { return _target_offset; }
1202 };
1203
1204
1205 // Interface to java.security.AccessControlContext objects
1206
1207 class java_security_AccessControlContext: AllStatic {
1208 private:
1209 // Note that for this class the layout changed between JDK1.2 and JDK1.3,
1210 // so we compute the offsets at startup rather than hard-wiring them.
1211 static int _context_offset;
1212 static int _privilegedContext_offset;
1213 static int _isPrivileged_offset;
1214 static int _isAuthorized_offset;
1215
1216 static void compute_offsets();
1217 public:
1218 static oop create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS);
1219
1220 static bool is_authorized(Handle context);
1221
1222 // Debugging/initialization
1223 friend class JavaClasses;
1224 };
1225
1226
1227 // Interface to java.lang.ClassLoader objects
1228
1229 #define CLASSLOADER_INJECTED_FIELDS(macro) \
1230 macro(java_lang_ClassLoader, loader_data, intptr_signature, false)
1231
1232 class java_lang_ClassLoader : AllStatic {
1233 private:
1234 // The fake offsets are added by the class loader when java.lang.Class is loaded
1235 enum {
1236 hc_parent_offset = 0
1237 };
1238 static int _loader_data_offset;
1239 static bool offsets_computed;
1240 static int parent_offset;
1241 static int parallelCapable_offset;
1242
1243 public:
1244 static void compute_offsets();
1245
1246 static ClassLoaderData** loader_data_addr(oop loader);
1247 static ClassLoaderData* loader_data(oop loader);
1248
1249 static oop parent(oop loader);
1250 static bool isAncestor(oop loader, oop cl);
1251
1252 // Support for parallelCapable field
1253 static bool parallelCapable(oop the_class_mirror);
1254
1255 static bool is_trusted_loader(oop loader);
1256
1257 // Fix for 4474172
1258 static oop non_reflection_class_loader(oop loader);
1259
1260 // Testers
1261 static bool is_subclass(Klass* klass) {
1262 return klass->is_subclass_of(SystemDictionary::ClassLoader_klass());
1263 }
1264 static bool is_instance(oop obj) {
1265 return obj != NULL && is_subclass(obj->klass());
1266 }
1267
1268 // Debugging
1269 friend class JavaClasses;
1270 friend class ClassFileParser; // access to number_of_fake_fields
1271 };
1272
1273
1274 // Interface to java.lang.System objects
1275
1276 class java_lang_System : AllStatic {
1277 private:
1278 enum {
1279 hc_static_in_offset = 0,
1280 hc_static_out_offset = 1,
1281 hc_static_err_offset = 2,
1282 hc_static_security_offset = 3
1283 };
1284
1285 static int static_in_offset;
1286 static int static_out_offset;
1287 static int static_err_offset;
1288 static int static_security_offset;
1289
1290 public:
1291 static int in_offset_in_bytes();
1292 static int out_offset_in_bytes();
1293 static int err_offset_in_bytes();
1294
1295 static bool has_security_manager();
1296
1297 // Debugging
1298 friend class JavaClasses;
1299 };
1300
1301
1302 // Interface to java.lang.StackTraceElement objects
1303
1304 class java_lang_StackTraceElement: AllStatic {
1305 private:
1306 enum {
1307 hc_declaringClass_offset = 0,
1308 hc_methodName_offset = 1,
1309 hc_fileName_offset = 2,
1310 hc_lineNumber_offset = 3
1311 };
1312
1313 static int declaringClass_offset;
1314 static int methodName_offset;
1315 static int fileName_offset;
1316 static int lineNumber_offset;
1317
1318 public:
1319 // Setters
1320 static void set_declaringClass(oop element, oop value);
1321 static void set_methodName(oop element, oop value);
1322 static void set_fileName(oop element, oop value);
1323 static void set_lineNumber(oop element, int value);
1324
1325 // Create an instance of StackTraceElement
1326 static oop create(Handle mirror, int method, int version, int bci, TRAPS);
1327 static oop create(methodHandle method, int bci, TRAPS);
1328
1329 // Debugging
1330 friend class JavaClasses;
1331 };
1332
1333
1334 // Interface to java.lang.AssertionStatusDirectives objects
1335
1336 class java_lang_AssertionStatusDirectives: AllStatic {
1337 private:
1338 enum {
1339 hc_classes_offset,
1340 hc_classEnabled_offset,
1341 hc_packages_offset,
1342 hc_packageEnabled_offset,
1343 hc_deflt_offset
1344 };
1345
1346 static int classes_offset;
1347 static int classEnabled_offset;
1348 static int packages_offset;
1349 static int packageEnabled_offset;
1350 static int deflt_offset;
1351
1352 public:
1353 // Setters
1354 static void set_classes(oop obj, oop val);
1355 static void set_classEnabled(oop obj, oop val);
1356 static void set_packages(oop obj, oop val);
1357 static void set_packageEnabled(oop obj, oop val);
1358 static void set_deflt(oop obj, bool val);
1359 // Debugging
1360 friend class JavaClasses;
1361 };
1362
1363
1364 class java_nio_Buffer: AllStatic {
1365 private:
1366 static int _limit_offset;
1367
1368 public:
1369 static int limit_offset();
1370 static void compute_offsets();
1371 };
1372
1373 class java_util_concurrent_locks_AbstractOwnableSynchronizer : AllStatic {
1374 private:
1375 static int _owner_offset;
1376 public:
1377 static void initialize(TRAPS);
1378 static oop get_owner_threadObj(oop obj);
1379 };
1380
1381 // Use to declare fields that need to be injected into Java classes
1382 // for the JVM to use. The name_index and signature_index are
1383 // declared in vmSymbols. The may_be_java flag is used to declare
1384 // fields that might already exist in Java but should be injected if
1385 // they don't. Otherwise the field is unconditionally injected and
1386 // the JVM uses the injected one. This is to ensure that name
1387 // collisions don't occur. In general may_be_java should be false
1388 // unless there's a good reason.
1389
1390 class InjectedField {
1391 public:
1392 const SystemDictionary::WKID klass_id;
1393 const vmSymbols::SID name_index;
1394 const vmSymbols::SID signature_index;
1395 const bool may_be_java;
1396
1397
1398 Klass* klass() const { return SystemDictionary::well_known_klass(klass_id); }
1399 Symbol* name() const { return lookup_symbol(name_index); }
1400 Symbol* signature() const { return lookup_symbol(signature_index); }
1401
1402 int compute_offset();
1403
1404 // Find the Symbol for this index
1405 static Symbol* lookup_symbol(int symbol_index) {
1406 return vmSymbols::symbol_at((vmSymbols::SID)symbol_index);
1407 }
1408 };
1409
1410 #define DECLARE_INJECTED_FIELD_ENUM(klass, name, signature, may_be_java) \
1411 klass##_##name##_enum,
1412
1413 #define ALL_INJECTED_FIELDS(macro) \
1414 CLASS_INJECTED_FIELDS(macro) \
1415 CLASSLOADER_INJECTED_FIELDS(macro) \
1416 MEMBERNAME_INJECTED_FIELDS(macro)
1417
1418 // Interface to hard-coded offset checking
1419
1420 class JavaClasses : AllStatic {
1421 private:
1422
1423 static InjectedField _injected_fields[];
1424
1425 static bool check_offset(const char *klass_name, int offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1426 static bool check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1427 static bool check_constant(const char *klass_name, int constant, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1428
1429 public:
1430 enum InjectedFieldID {
1431 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD_ENUM)
1432 MAX_enum
1433 };
1434
1435 static int compute_injected_offset(InjectedFieldID id);
1436
1437 static void compute_hard_coded_offsets();
1438 static void compute_offsets();
1439 static void check_offsets() PRODUCT_RETURN;
1440
1441 static InjectedField* get_injected(Symbol* class_name, int* field_count);
1442 };
1443
1444 #undef DECLARE_INJECTED_FIELD_ENUM
1445
1446 #endif // SHARE_VM_CLASSFILE_JAVACLASSES_HPP